Physical fitness is not only one of the most important keys to a healthy body, it is the basis of dynamic and creative intellectual activity
Breathing correctly is the key to better fitness, muscle strength, stamina and athletic endurance
Guided only by their feeling for symmetry, simplicity, and generality, and an indefinable sense of the fitness of things, creative mathematicians now, as in the past, are inspired by the art of mathematics rather than by any prospect of ultimate usefulness
It is not about weight, it is about fitness, and one component of being fit is to have relatively low body fat, because fat is not very efficient, whereas muscle is.
Tactics, fitness, stroke ability, adaptability, experience, and sportsmanship are all necessary for winning.
A drunkard in the gutter is just where he ought to be, according to the fitness and tendency of things. Nature has set upon him the process of decline and dissolution by which she removes things which have survived their usefulness
Perhaps our own fin-de-sicle decadence takes the form, not of libertarian excess, but of the kind of over-the-top puritanism we see in political correctness and the assorted moral certainties of physical fitness fanatics, New Agers and animal-rights activists.